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(No Modl.) I I 2 Sheets'-Sheet 1.

. W. H. HART.

SUBWAY FOR ELECTRICAL GONDUGTORS.

No. 564,994. I Patented Aug, 4, 1896.

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(No Model.) I 2 Sheets-Sheet 2.

. W. H. HART. SUBWAY PUB. ELECTRICAL GONDUGTOES. No. 564,994. Patented Aug. 4, 1896.

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UNITED STATES PATENT Erica.

IVILLIAM H. HART, OF BROOKLYN, NENV YORK, ASSIGNOR TO LElVIS MAY,

OF NEW YORK, N. Y.

SUBWAY FOR ELECTRICAL CONDUCTORS.

SPECIFICATION forming part of Letters Patent No. 564,994, dated August 4, 1896.

Application filed May 20, 1896. Serial No. 592,271. (No model.)

- To all whom it may concern.- hole opening and lateral distribution exten- Be it known that I, WILLIAM H. HART, a sion; Fig. 5, a transverse section showing a citizenoftheUnited States,residingat Brookcover-piece adapted to be placed over the lyn, in the county of Kings and State of New opening indicated in Fig. at, and Figs. 6 and 5 York, have invented certain new and useful 7 detail views illustrating the clamping de- Improvements in Subways for Electrical Convices applied at the joints between the secductors, of which the following is a specifications of the conduit. tion. The conduit is constructed of two series of In Letters Patent of the United States No. sections arranged end to end, an upper series 10 380,757, granted April 10, 1888, to myself and and a lower series. The joint between two James T. Goodfellow, is shown a subway syssections of the upper series is formed at the tem in many respects analogous to that herecenter of a section of the lower series, and in described, and upon which my present invice versa. vention is an improvement. Except as herein A shows an upper section, and B B indicate 25 specified, the organization herein is similar lower sections. The manner of placingthem to that disclosed in said Letters Patent, and together and locking them in position is the to the construction that has been adopted in same as that indicated in the patent already practice in the laying of the system of the referred to. Atpoints where it is desirable patent in the city of New York and elsewhere. to carry out wires for distribution the upper 20 One defect of the system disclosed in the section is formed as indicated in Fig. 4. The patent above mentioned has been the disopening there shown may be closed by a solid placement of the partitions forming the concover-piece or by a cover-piece as indicated duits to receive the conductors after the in Fig. 5, which is open at the top and formed structure has been laid in the earth. An 00- with a groove 50 for the reception of a solid 7 5 2 5 ourrence or accident of this character has cover or another open section where it is debeen exceedingly annoying, as the fall of a sired to build up to the surface, the solid partition in one of the sections sometimes coverthen being applied inside. These matresulted in the passage of the pilot used in tors are all well known, however, and form threading a conductor into a duct from one no part of my present invention. o duct into another, either above, below, or to In my present organization the vertical parone side, making it necessary to uncover the titions O C, of which there may be one, two, conduit, open it, and make the proper correcor more, according to the size of the conduit, tion and repair of the partitions. In the sysare formed in one piece with the lower sectem of the patent as heretofore put in use tion. A horizontal partition D, having chan- S5 3 5 there has also been trouble from the breaknels or seats 02 to receive the upper ends of age of the upper castings, due to the use of the partition O, is then placed in position, and picks in excavating, or to the passage of very the ends of the part D are in suitable proxheavy trucks over the pavement when the innit-y to the side walls of the conduit. On conduit has been protected by an insufficient the upper face of the partition D are similar 4o layer of earth. channels or seats (1 to receive the partition E, The object of my present invention is to extendingdownwardlyfrom andformedinone improve the construction of conduits of this piece withahorizontal partition E. Thisparclass; and to this end the invention consists tition E has upon its upper face channels or in certain improved features of construction seats cto receive vertical partitions A, formed 9 5 45 hereinafter set forth and claimed. in one piece with and extending down from In the accompanying drawings, Figure 1 is the top wall of the upper conduit-section. It a longitudinal elevation of a sect-ion of a conwill be obvious that with such a construction duit; Fig. 2, a section therethrough on the a displacement of the partitions will be imline 2 2 of Fig. 1 Fig. 3, a similar section possible, and the formation of the vertical I00 50 on the line 3 3 of Fig. 1; Fig. 4C, a detached partitions O C and A A upon and in one plan showing a section provided with ahandpiece with the upper and lower sections, re-

spectively, adds to the stiifness and strength of these sections. The upper and lower sections A B may be cast, and when made as described the upper sections are better able to resist the strains and blows hereinbefore referred to. A greater degree of strength, toughness, and durability may however be obtained by making the sections of wrought metal, giving them their general form by rolling. The lugs or hooks Y Y may then be attached to the sections in any suitable manner.

I claim as my invention- 1. In a subway system of the character described, the combination of the upper and lower sections A 13 joined as described to form a closed conduit, and vertical and horizontal partitions dividing the closed conduit into ducts, the vertical partitions A A at the top of the conduit being formed in one piece with the upper section A, and the horizontal partitions being removable, all substantially as and for the purpose set forth.

2. In a subway system of the character described, the combination of the upper and lower sections A B joined as described to form a closed conduit, vertical and horizontal partitions dividing the interior of the conduit into ducts, the vertical partitions of the upper part of the conduit being formed in one piece with the upper section A, and the vertical partitions at the lower part of the conduit being formed in one piece with the lower section B, and the horizontal partitions being removable and respectively formed in one piece, all substantially as and for the purpose set forth.

3. In a subway system, substantially such as herein described, the combination of the upper and lower sections, each having vertical partitions formed in one piece therewith, a horizontal partition having in its upper and lower faces channels or seats for vertical partitions, and a second horizontal partition havin g vertical partitions in one piece therewith, and extending from one side thereof and having on its other side seats or channels;

In testimony whereof I have hereunto subscribed my name,

WILLIAM H. HART. lVitnesses:

FRANK S, OBER,

BATHARINE GEORGI. 

